我国干旱区典型哺乳动物野兔剂量评估模型的建立及应用  

Establishment and Application of dose evaluation model for typical mammal in dry region in China

作　　者：原寒 贡文静 韩学垒[1] 曹少飞[1] 李建国[1] YuanHan;GongWenjing;HanXuelei;Cao Shaofei;Li Jianguo(China Institute for Radiation Protection,Taiyuan 030006,China)

机构地区：[1]中国辐射防护研究院,太原030006

出　　处：《中华放射医学与防护杂志》2022年第10期793-798,共6页Chinese Journal of Radiological Medicine and Protection

基　　金：中国辐射防护研究院纵向项目。

摘　　要：目的通过对我国干旱地区进行生态环境调查,选定该地区广泛分布的哺乳动物野兔(Lepus sinensis)作为参考物种,建立简化解剖学模型,将内外照射剂量转换系数的计算结果和评价与管理软件(ERICA)结果进行比较并分析原因,验证本模型的合理性。方法针对野兔建立基于解剖学和几何学的简化解剖学模型,结合蒙特卡罗程序,得到3种放射性核素粒子在野兔组织/器官中沉积能,根据经验公式计算出野兔内外照射剂量系数(DCs)。结果^(129)I、^(137)Cs、^(134)Cs对野兔简化解剖学模型整体平均内照射DCs结果分别为4.81×10^(-6)、4.35×10^(-5)、3.81×10^(-5)(μGy·h^(-1))/(Bq·kg^(-1));外照射DCs结果分别为3.16×10^(-7)、2.39×10^(-4)、6.22×10^(-4)(μGy·h^(-1))/(Bq·kg^(-1))。ERICA软件计算^(129)I、^(137)Cs、^(134)Cs对生物整体内照射DCs结果分别为4.44×10^(-5)、1.94×10^(-4)、2.34×10^(-4)(μGy·h^(-1))/(Bq·kg^(-1));外照射DCs结果分别为2.19×10^(-6)、2.52×10^(-4)、6.95×10^(-4)(μGy·h^(-1))/(Bq·kg^(-1))。结论本次建立的简化解剖学模型基于实际测量数据,关注生物组织/器官的辐射剂量,计算条件更接近实际情况,可为核素分布不均匀的非人类物种参考生物评价提供参考价值。Objective To establish a simplified anatomical model with the selected rabbits widely distributed in China's dry region as the reference species and compare the result of internal exposure dose coefficients based on the present mode and ERICA.Methods A simplified anatomical model based on anatomy and geometry was established for rabbits.Combined with Monte Carlo program,the deposited energy of radionuclide particles in rabbit tissues/organs was obtained,and the internal and external exposure dose coefficient for rabbits was calculated following the empirical formula.Results Simplified anatomy model-based dose coefficients were^(129)I 4.81×10^(-6),^(137)Cs 4.34×10^(-5),and^(134)Cs 3.81×10^(-5)(μGy·h^(-1))/(Bq·kg^(-1))for internal exposure and^(129)I 3.16×10^(-7),^(137)Cs 2.39×10^(-4)and^(134)Cs 6.22×10^(-4)(μGy·h^(-1))/(Bq·kg^(-1))for external exposure.respectively.ERICA-based dose coefficients were^(129)I 4.44×10^(-5),^(137)Cs 1.94×10^(-4)and^(134)Cs 2.34×10^(-4)(μGy·h^(-1))/(Bq·kg^(-1))for internal exposure and^(129)I 2.19×10^(-6),^(137)Cs 2.52×10^(-4)and^(134)Cs 6.95×10^(-4)(μGy·h^(-1))/(Bq·kg^(-1))for external exposure,respectively.Conclusions The simplified anatomical model established is based on the measured data and focuses on the radiation doses to biological tissues/organs,and the calculated result based on the present model are closer to the actual situation,and can provide reference values for the reference biological evaluation of non-human species.

关 键 词：野兔 简化解剖学模型 剂量系数 评价与管理软件 

分 类 号：R-332[医药卫生] R144.1